Sulphite just needs to be a drop. No Niko; maybe he can do a Zana-style Delve. All problems fixed.

I really don't want to port in my delver character every time I find sulphite on my mapping character. And I really don't see why I have to ask guild members to port me in when they find sulphite on their maps.

Make it a currency drop. Done with it. The market will figure out the rest, as it has for everything else in PoE. Sulphite is in demand. Make it something you find and trade.

Make an Abyss that spews into a sulphite node at the end with empowered monsters, and the geyser erupts in sulphite when it's completed aka Perandus, where everyone present for the whole dangerous situation gets a cut of the sulphite.

With a shared Delve across all characters there is no Delve ladder any more. Just be done with it. Make it a currency already. Why is this one thing not a currency. Even Azurite is valued as currency due to Resonator costs on vendors.

Edit: Ok even better; like Abyss, except when you trigger it, multiple fissures go off to the corners of the map - you have to pick one and the longest one gives the most sulphite. This means you need to know the map and know where you triggered the sulphite abyss and guess which one is the 'good vein' to follow. Or pick a short one because maybe the boss is closer. When you find the node at the end of the fissure, Niko comes in and begins mining and you have to kill off all the Delve monsters while he digs. Finish up with a spew of new sulphite yellow currency and yeah. Fix this already.

Tired :) Going to sleep.

Just map on your "delver". Or do delves on your mapper. Problem solved.
You dont need to thank me

I've been thinking of a sulphite dig or stockpile encounter in Delve.
Maybe adjust your path to visit a sulphite cache and delay the amount of time before you have to go back to scrounging maps.

Or you can just make characters that are good.. you don't need to delete bosses in 5 seconds or complete a map in 30 seconds to be considered a bosser or a mapper. Just play the game and grab sulphite nodes, then go into delve.

I've never really understood this mentality in PoE where you "need" to have separate characters for separate events. Look at Mathil as an example, he just takes w/e build he is playing and just goes ham in all the content.

Eh, Though I do want a source of Sulphite outside of mapping, I don't want it trade-able. Trade-able sulphite makes the ladder pointless since it becomes a popularity contest of who can get more people to farm sulphite for them. There needs to be another way to get sulphite other then running maps.

Make Sulfite tradable ???

Screw that, SCREW that.
Sulfite isn't an economy token, I don't want to have it harder to access for SSF players just because you can't be f***** to get it yourself, you want it ? you "farm" it, period.

On top of that, if you character is well built, it should have no problem in maps.

What delving character is incapable of maps? I didn't think that would even be a thing.